我有两个对象Zend_Date类,我想计算它们之间的全日历月.我怎样才能做到这一点的区别?
<?php
$d1 = new Zend_Date('1 Jan 2008');
$d2 = new Zend_Date('1 Feb 2010');
$months = $d1->sub($d2)->get(Zend_Date::MONTH);
assert($months == -25); // failure here
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提前致谢!